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首页> 外文学位 >Wetland resources of eastern South Dakota; Drainage patterns, assessment techniques, and predicting future risks.
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Wetland resources of eastern South Dakota; Drainage patterns, assessment techniques, and predicting future risks.

机译：南达科他州东部的湿地资源；排水方式，评估技术和预测未来风险。

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摘要

This study looks at drainage patterns, landscape impacts on wetland quality, and lastly a method of prioritizing wetlands for conservation in Eastern South Dakota. The first objective of this study was to determine why and where drainage occurred. I found that agricultural conversion was the main reason for wetland drainage and modification and that wetland drainage occurred close to historical drainage districts. A second objective of this study was to explore linkages between land use patterns and wetland condition in eastern South Dakota, and develop and evaluate a rapid assessment protocol for wetlands in the Prairie Pothole Region of Eastern South Dakota. Landscape level assessments were done using the Landscape Development Intensity Index (LDI); in general, nutrient loading indices were positively correlated to LDI, implying that the LDI is useful for characterizing potential wetland disturbance at the landscape level. Using site-specific data, I developed and quantified wetland condition using the South Dakota Wetland Rapid Assessment protocol (SD-WRAP). SD-WRAP scores were strongly correlated to both the LDI and independent expert evaluations. Hence, the SD-WRAP developed here provides a relatively quick and simple approach for gathering site specific data, and can provide an important tool for wetland monitoring and assessment, as well as identify potential reference sites. Lastly, I used a Gap Analysis to try to identify where wetlands might be at risk for being drained or negatively impacted by land conversion. I overlaid areas that relate to wetland drainage and conversion such as landscape disturbance and wetland size to help determine areas in Eastern South Dakota that might be at risk. After completing the Gap Analysis for both high and low risk areas, I found that the percent of public lands are equal in both areas; however there are fewer wetlands on public lands in high risk areas. Gap Analysis could be used to state and federal agencies to help determine where more wetlands should be conserved.;Key words: wetland, South Dakota, land use, wetland assessment, Landscape Development Intensity index, drainage, risk assessment
机译：这项研究着眼于排水方式，景观对湿地质量的影响，最后研究了优先排序湿地以进行南达科他州东部保护的方法。这项研究的首要目标是确定排水的原因和地点。我发现农业转变是造成湿地排水和改良的主要原因，并且湿地排水发生在历史流域附近。这项研究的第二个目的是探索南达科他州东部土地利用方式与湿地条件之间的联系，并制定和评估南达科他州东部大草原坑洼地区湿地的快速评估方案。景观水平评估使用景观发展强度指数（LDI）进行；一般而言，养分负荷指数与LDI正相关，这表明LDI可用于表征景观水平上潜在的湿地扰动。利用特定地点的数据，我使用南达科他州湿地快速评估协议（SD-WRAP）开发并量化了湿地条件。 SD-WRAP得分与LDI和独立专家评估都密切相关。因此，这里开发的SD-WRAP提供了一种相对快速简便的方法来收集特定地点的数据，并且可以为湿地监测和评估以及确定潜在的参考地点提供重要的工具。最后，我使用了差距分析来尝试确定湿地在哪些地方可能面临流失或受到土地转换的不利影响的风险。我叠加了与湿地排水和转换有关的区域，例如景观干扰和湿地面积，以帮助确定南达科他州东部可能存在风险的区域。在完成高风险和低风险区域的差距分析之后，我发现在这两个区域中公共土地的百分比是相等的。但是，高风险地区的公共土地上的湿地较少。差距分析可用于州和联邦机构，以帮助确定应在哪里保护更多的湿地。关键词：湿地，南达科他州，土地利用，湿地评估，景观开发强度指数，排水，风险评估

著录项

  • 作者

    Bouchard, Michelle A.;

  • 作者单位

    South Dakota State University.;

  • 授予单位 South Dakota State University.;
  • 学科 Water Resource Management.;Remote Sensing.;Environmental Sciences.
  • 学位 M.S.
  • 年度 2009
  • 页码 114 p.
  • 总页数 114
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境科学基础理论;遥感技术;
  • 关键词

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